Invention Grant
US5831964A Recording medium having first tracks and second tracks at different
levels and with different recording formats
失效
具有不同级别并具有不同记录格式的第一轨道和第二轨道的记录介质
- Patent Title: Recording medium having first tracks and second tracks at different levels and with different recording formats
- Patent Title (中): 具有不同级别并具有不同记录格式的第一轨道和第二轨道的记录介质
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Application No.: US890343Application Date: 1997-07-09
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Publication No.: US5831964APublication Date: 1998-11-03
- Inventor: Toshihisa Tanaka
- Applicant: Toshihisa Tanaka
- Applicant Address: JPX Tokyo
- Assignee: Nikon Corporation
- Current Assignee: Nikon Corporation
- Current Assignee Address: JPX Tokyo
- Priority: JPX7-103890 19950427
- Main IPC: G11B7/0037
- IPC: G11B7/0037 ; G11B7/007 ; G11B7/24 ; G11B11/105 ; G11B20/12 ; G11B27/19 ; G11B27/24 ; G11B27/30
Abstract:
A disc, such as a magneto-optical disc or an optical disc, for recording data. The disk includes a first track and a second track. The first track is formed at a first level in the disc and is for recording data in a first format. The second track is formed at a second level in the disc and is for recording data in a second format. The first level is a different level than the second level, and the first format is a different format than the second format.
Public/Granted literature
- US5202509A Catalysts for liquid phase fluorination Public/Granted day:1993-04-13
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